M7620

M7620 MOSDESIGN | Alldatasheet

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Technical content

一華半導體股份有限公司 MOSDESIGN SEMICONDUCTOR CORP.

DESCRIPTION

integrated circuit combines all required functions for a single chip Passive Infra Red (PIR) light controller. It is designed for load switching with a transistor or a relay in 3 wire AC and DC systems. A conventional PIR sensor conn ects directly to the PIR input. The pull down resistor and DC decoupling circuitry are integrated on chip. The PIR signal is converted to a 15 bit digital value. External potentiometers or resistors are used to set the operating parameters for sensitivity , on time, CDS sensor. The corresponding voltage levels are converted to digital values with a 4 bit resolution all signal processing is performed digitally.

FEATURES

Adjustable PIR sensitivity Adjustable output turn on time Re trigger/Non retrigger function R ELAY output SOP package

APPLICATIONS

PIR light controller, Motion Detector, Alarm system, Auto door bell PIN ASSIGMENT ON TIME PIRIN SENS CDS RELAY VDD VSS RETRIG M7620

一華半導體股份有限公司 MOSDESIGN SEMICONDUCTOR CORP. BLOCK DIAGRAM PIN DESCRIPTION Pin No. Name I/O I Retrigger mode select input. VDD or floating As long as movement is detected within the on time, the light will remain on. VSS The light will first switch off, before it can be switched on again. PIRIN I PIR sensor input VSS Ground RELAY O Relay output pin SENS I Sensitivity threshold adjustment Sets the sensitivity threshold required to generate a trigger condition. Refer to T ble1 ON TIME I Light on time adjustment. Refer to T ble1 CDS I Connect to the CDS voltage divider for daytime/nig ht auto detecting, VDD Enable switching of the light VSS Disable switching of the light VDD Positive power supply CDS PIRIN REL AY SENS ON TIME Input Amplifier A /D Converter Band Pass Filter Controller Oscillator

一華半導體股份有限公司 MOSDESIGN SEMICONDUCTOR CORP. FUNCTION DESCRIPTION Power up Mode After the device powers on it first enters a warm up period. The light is switched on for the select ed on time duration. The CDS input is ignored on power up, to allow the user to verify the installation during daylight conditions. Trigger C ondition The SENS threshold (refer to table 1) is multiplied, When the filtered PIR signal exceeds this threshold, a trigger condition occurs. Condit ions for Switching the Light ON If a trigger condition occurs and the CDS input is high, the light will be switched on. The light and the relay will remain on for the duration set by the ON TIME input. Pin V oltage VD D On time SENS D istance (13/32) xVDD ≤Vin 15/32)xVDD 38.4 min (11/32) xVDD ≤Vin 13/32)xVDD 19.2 min (9/3)2 xVDD ≤Vin 11/32) xVDD 9.6 min (7/32) xVDD ≤Vin 9/32) xVDD 4.8 min (5/32) xVDD ≤Vin 7/32) xVDD .4 min (3/32) xVDD ≤Vin 5/32) xVDD 72 sec (1/32) xVDD ≤Vin 3/32) xVDD 36 sec ≤Vin 1/32) xVDD 9 sec Near distance Long distance Table On time , SENS distance

一華半導體股份有限公司 MOSDESIGN SEMICONDUCTOR CORP. ABSOLUTE MAXIMUM RATING TA Parameter Sym. Min. Max. Unit Remarks Operating V oltage VDD 0.3 V V oltage On Any Pin 100 100 mA Operating Temperature Storage temperature T st 125

ELECTRICAL CHARACTERISTICS

,VDD= 4.4 V Characteristics Sym. Min. Typ. Max. Unit Conditions Operating Voltage Supply voltage VDD 3.3 4.4 5.0 V Supply current IDD 200 μA VDD= V utputs unloaded) Oscillator and Filter LPF cutoff frequency Hz HPF cutof f frequency Hz Clock frequency F CLK KHz Analog Inputs Input leakage current ON TIME S ENS μA PIRIN resistance to VSS K Ω PIRIN input AC voltage mV Peak to Peak PIRIN input DC voltage 1.5 V Digita l Inputs, Schmitt Triggers RETRIG CDS Input low voltage V IL %VDD Input high voltage V IH %VDD Pull up current on RETRIG μA input to VSS Leakage current on CDS μA input to VSS or VDD Digital Outputs Relay Source Curr ent I RS mA

一華半導體股份有限公司 MOSDESIGN SEMICONDUCTOR CORP. APPLICATION CIRCUIT AC Application Circuit DC Application Circuit All specs and applications shown above subject to change without prior notice. RETRIG VDD Retrigger VSS N on Retrigger CDS (N) PIR D S G RELAY HT7144 100u F /50V C R 8050 0.1u F C C u F /25V Lamp VR1 VR2 VR3 12V DB1048 68K 22K 22K 22K 22K IN4148 L DO ON TIME PIRIN SENS CDS RELAY VDD VSS RETRIG M7620 470nF C /275V 100R/1W (L) C RETRIG VDD Retrigger VSS N on Retrigger 470nF CDS PIR D S G RELAY HT7144 u F 0.1u F C C 10u F C VR1 VR2 VR3 K 47K 47K 22K 22K IN4148 LDO R Q 8050 C 9V/12V SN4007 ON TIME PIRIN SENS CDS RELAY VDD VSS RETRIG M7620

一華半導體股份有限公司 MOSDESIGN SEMICONDUCTOR CORP. PACKAGE OUTLINE SYMBOLS MIN MAX A 0.053 0.069 0.004 0.010 0.059 D 0.189 0.196 E 0.150 0.157 H 0.228 0.2 L 0.01 0.050 θ Unit : INCH 0.05 TYP. 0.016 TYP. 0.008 TYP. L θ E H SEATING PLANE 0.004 MAX. D A 0.015X45 SOP